Page 197 - BA2 Integrated Workbook STUDENT 2018

Risk 1: Summarising and analysing data

2.4 Cumulative frequency distributions

It is sometimes helpful to develop the idea of frequency further and to look at
cumulative frequencies. These are the number of data values up to (or up to and
including) a certain point. They can easily be compiled as running totals from the
corresponding frequency distribution.

Using the previous example:

Grouped outcomes Frequency Cumulative
frequency
0 – 5 1 1

6 – 10 3 4
11 – 15 5 9

16 – 20 1 10
21 – 25 2 12

26 and over 1 13

Illustrations and further practice

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